import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;

public class Demo8_TransIO {

        /**
         * @param args
         * 转换流
         * @throws IOException
         * 字符流(字节流+编码表)
         * 读gbk编码表的文件写到utf-8编码表文件
         * 高效
         */
        public static void main(String[] args) throws IOException {
                //demo1();
                //demo2();
                //demo3();
                //demo4();
                BufferedReader br =
                                new BufferedReader(new InputStreamReader(new FileInputStream("day22笔记.txt"),"gbk"));
                BufferedWriter bw =
                                new BufferedWriter(new OutputStreamWriter(new FileOutputStream("UTF-8.txt"),"UTF-8"));
                int ch;
                while((ch = br.read()) != -1) {
                        bw.write(ch);
                }
                br.close();
                bw.close();
        }
}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;

public class Demo8_TransIO {

        /**
         * @param args
         * 转换流
         * @throws IOException
         * 字符流(字节流+编码表)
         * 读gbk编码表的文件写到utf-8编码表文件
         * 高效
         */
        public static void main(String[] args) throws IOException {
                //demo1();
                //demo2();
                //demo3();
                //demo4();
                BufferedReader br =
                                new BufferedReader(new InputStreamReader(new FileInputStream("day22笔记.txt"),"gbk"));
                BufferedWriter bw =
                                new BufferedWriter(new OutputStreamWriter(new FileOutputStream("UTF-8.txt"),"UTF-8"));
                int ch;
                while((ch = br.read()) != -1) {
                        bw.write(ch);
                }
                br.close();
                bw.close();
        }
}